I'm impressed, this is a nicely done map, not too detailed and not underdetailed (apart from some plain areas).
Also if the train has Train=yes it should crush anything, from infantry to even buildings. The train should have this tag by default.
Anyway, I'm quite fond of your mapping style, the map itself seems balanced as well. Try getting more variation in the city by using different pavement tiles like the cracks and avoid using the same building in the city more than once (unless it's a large city), I know there's a lack in variety, but try to make it as less repetetive as you can.

Anyway, keep up the good work, I can see you producing some good maps in the future.